[What do you mean she's not a kid, Ibuki's clearly just a giant toddler.
Case in point: she sticks out her tongue with a grumble when told to take it down a notch.
She's going to anyway, because Rohan is cool and doesn't seem like he'd be very fun when annoyed, but that doesn't mean she has to like it.

... Which mostly means being more still and talking a little quieter. A little.]

Less sentimental? No way - Ibuki treasures anything she gets from her friends, y'know?
Like these earrings! Ibuki's never gonna take them off! Except to, like, sleep and stuff.
But any other time, they're permanent attachments and should be considered part of Ibuki's unique style!

And likewise, Rohan-chan's artwork is gonna hang in Ibuki's room for as long as she's here. I'll write a note about it and everything!
If people come and go and lose memories so much, then Ibuki's gotta make sure she always remembers who it's from!

[Yeah, just straight up calls him her friend, whether he agrees or not. Sorry man, friendship ain't a two way street with Ibuki.]